From: Suresh Gumpula <suresh.gumpula@nutanix.com>
To: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Virtual LAPIC page corruption
Date: Wed, 13 May 2020 04:21:12 +0000 [thread overview]
Message-ID: <67D1E884-FE2C-44C3-8214-75958A9D445A@nutanix.com> (raw)
Hi,
We are a seeing a problem with windows guests(2016/2012R2) where guest crashes with
Virtual APIC page corruption similar to the following redhat ticket.
https://bugzilla.redhat.com/show_bug.cgi?id=1751017
> Arg4: 0000000000000017, Type of corrupted region, can be
16 : Critical floating point control register modification
17 : Local APIC modification
Here, we are seeing the corruption LAPIC page and guest is BSOD'ing.
Looking at the guest windows dump, we see the full page is zeroed. And it seems the
Guest windows kernel patchguard is detecting this case and resetting the VM.
Is it possible that KVM, somehow corrupted the virtual LAPIC page? While the guest is running
the KVM is not supposed to touch that vcpu lapic page?
Could you please give us some pointers on what could wrong here. Is it a known issue in the kvm?
We are using the host kernel 4.19 and qemu 2.12 and windows guests(2016/2012)
Thanks,
Suresh
next reply other threads:[~2020-05-13 4:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-13 4:21 Suresh Gumpula [this message]
2020-05-14 15:21 ` Virtual LAPIC page corruption Suresh Gumpula
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=67D1E884-FE2C-44C3-8214-75958A9D445A@nutanix.com \
--to=suresh.gumpula@nutanix.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.